{
  "id": "CVE-2022-49980",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2025-06-18T11:15:25.480",
  "lastModified": "2025-06-18T13:46:52.973",
  "vulnStatus": "Awaiting Analysis",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nUSB: gadget: Fix use-after-free Read in usb_udc_uevent()\n\nThe syzbot fuzzer found a race between uevent callbacks and gadget\ndriver unregistration that can cause a use-after-free bug:\n\n---------------------------------------------------------------\nBUG: KASAN: use-after-free in usb_udc_uevent+0x11f/0x130\ndrivers/usb/gadget/udc/core.c:1732\nRead of size 8 at addr ffff888078ce2050 by task udevd/2968\n\nCPU: 1 PID: 2968 Comm: udevd Not tainted 5.19.0-rc4-next-20220628-syzkaller #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google\n06/29/2022\nCall Trace:\n <TASK>\n __dump_stack lib/dump_stack.c:88 [inline]\n dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106\n print_address_description mm/kasan/report.c:317 [inline]\n print_report.cold+0x2ba/0x719 mm/kasan/report.c:433\n kasan_report+0xbe/0x1f0 mm/kasan/report.c:495\n usb_udc_uevent+0x11f/0x130 drivers/usb/gadget/udc/core.c:1732\n dev_uevent+0x290/0x770 drivers/base/core.c:2424\n---------------------------------------------------------------\n\nThe bug occurs because usb_udc_uevent() dereferences udc->driver but\ndoes so without acquiring the udc_lock mutex, which protects this\nfield.  If the gadget driver is unbound from the udc concurrently with\nuevent processing, the driver structure may be accessed after it has\nbeen deallocated.\n\nTo prevent the race, we make sure that the routine holds the mutex\naround the racing accesses."
    }
  ],
  "metrics": {},
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/2191c00855b03aa59c20e698be713d952d51fc18",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/f44b0b95d50fffeca036e1ba36770390e0b519dd",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}